| Donegal to Isny im Allgau | 917.67 mi (1,476.85 km) |
| Donegal to Isselburg | 632.06 mi (1,017.21 km) |
| Donegal to Issum | 638.82 mi (1,028.08 km) |
| Donegal to Itzehoe | 710.76 mi (1,143.85 km) |
| Donegal to Jena | 858.98 mi (1,382.40 km) |
| Donegal to Jever | 651.28 mi (1,048.13 km) |
| Donegal to Jork | 723.09 mi (1,163.70 km) |
| Donegal to Juchen | 655.35 mi (1,054.68 km) |
| Donegal to Julich | 655.70 mi (1,055.25 km) |
| Donegal to Juterbog | 889.68 mi (1,431.80 km) |
| Donegal to Kaarst | 656.11 mi (1,055.91 km) |
| Donegal to Kaiserslautern | 762.31 mi (1,226.82 km) |
| Donegal to Kalkar | 627.91 mi (1,010.52 km) |
| Donegal to Kall | 675.70 mi (1,087.43 km) |
| Donegal to Kaltenkirchen | 729.65 mi (1,174.25 km) |
